thanks for asking. We are trying to aggregate a lot of bitcoin related sites and build a true search engine, parsing through those sites and providing relevant results. For the time being, since we don't have a lot of data to work with yet, we are augmenting the search results with results from more traditional engines, like Google, Yahoo and Bing. The idea and hope is that once we aggregate more sites (as site owners will add them) we'll be able to provide more relevant results than all the other, generic engines. Stay tuned.